Thermal-Resistant C/SiC -5

C/SiC Carbon-Ceramic Composite Materials

Key Features & Advantages

• Thermal Stability:
  Interface design (e.g., alternating PyC/SiC layers) and matrix modification help reduce thermal expansion and suppress microcracks, ensuring dimensional stability at high temperatures.

• Oxidation Resistance:
  Ceramic coatings such as SiC and HfC effectively block oxygen diffusion, providing oxidation protection even above 2200°C.

• Friction Performance:
  Stable friction coefficient and low wear rate at temperatures over 1000°C, ideal for braking systems under extreme conditions.

Manufacturing Technology

• Preform Construction:

  • Conventional: Needle-punched or stitched fiber preforms form porous C/C bodies via CVI, followed by SiC matrix introduction through RMI.

  • Additive Manufacturing: Uses laser sintering or digital light processing to create short-fiber reinforced preforms, simplifying complex shapes and reducing costs.

• Densification Methods:

  • CVD (Chemical Vapor Deposition): Deposits PyC interface and SiC matrix for stronger bonding.

  • PIP (Precursor Infiltration & Pyrolysis): Repeated impregnation and pyrolysis with SiC precursor reduces porosity.

  • RMI (Reactive Melt Infiltration): Molten silicon reacts with carbon to rapidly form a dense SiC matrix.

Applications

• Aerospace:
  Thermal protection systems (e.g., nose cones, panels) and brake components; used in Porsche brake discs and heavy-duty truck pads.

• Rail Transit:
  Maglev train skids and high-speed train brake pads; replaces metal to reduce weight and improve durability.

• Defense & Military:
  Ultra-high-temperature oxidation-resistant parts for hypersonic vehicles; long-term protection above 2200°C with HfC/ZrB₂ coatings.